The people that think they are insane or have some insanity are normal. The ones who think their normal are the ones you should be afraid of. Every person out there has some insanity in them. Thankfully a majority of the time it is harmless.
I'm not are you? What systems do you have to make you think about asking that question. Do you have strange thoughts, are you seeing things that are not there? If so you better see a doctor soon.